spdl.io.get_abuffer_desc

get_abuffer_desc(codec: AudioCodec, *, label: str | None = None, sample_fmt: str | None = None) → str[source]

Construct abuffer filter description that can be used as an audio input to FilterGraph.

See also

Example

path = "foo.mp4"

demuxer = spdl.io.Demuxer(path)
codec = demuxer.audio_codec
decoder = spdl.io.Decoder(codec, filter_desc=None)
# use `anull` filter which does nothing for the illustration purpose
filter_graph = spdl.io.FilterGraph(f"{get_abuffer_desc(codec)},anull,abuffersink")

for packets in demuxer.streaming_demux(duration=1):
    frames = decoder.decode(packets)
    filter_graph.add_frames(frames)
    frames = filter_graph.get_frames()
Parameters:

  • codec – The source audio codec

  • label – Optional Attatch a label to the abuffer node, so that it can be referenced later. This makes it easy to refer to the input node when building filter graph with multiple input nodes. Without this argument, FFmpeg will construct a name like Parsed_abuffer_0.

  • sample_fmt – If provided, override the sample format.

Returns

The resulting abuffer filter expression.